Anyone have any idea why this PBR texture is having weird shading and lighting effects on my plane?
You must set the Color Space for your Normal Map image texture to Non-Color. You will want to do this for your roughness map as well. Only Basecolor, Subsurface Color, Emission, and Ambient Occlusion use a &quot;colored&quot; Color-Space such as sRGB or Linear, all the rest (Roughness, Metallic, Height(Displacement), Normal Map, etc..) use Non-Color space.